Using The Dc Injection Brake - YASKAWA CIMR-G7U Technical Manual



Using the DC Injection Brake

Set parameter b2-03 to apply the DC injection brake voltage to the motor while it is coasting to a stop, to stop
the motor and then restart it.
Set b2-03 to 0 to disable the DC injection brake at start.
Set the DC injection brake current using b2-02. DC injection braking is used at startup for flux vector control
with the current set in E2-03 (Motor no-load current).
Related Parameters
Name
Parameter
Number
Display
DC Injection
Braking
Current
b2-02
DCInj Current
DC Injection
Braking Time/
DC Excitation
b2-03
Time at Start
DCInj
Time@Start
Inputting the DC Injection Brake Command from Control Circuit Terminals
If you set a multi-function contact input terminal (H1-) to 60 (DC injection brake command), you can
apply the DC injection brake to the motor by turning ON the terminal for which the DC injection brake com-
mand has been set when the Drive is being stopped. DC injection braking is used at startup for flux vector con-
trol.
The time chart for the DC injection brake is shown below.
DC injection brake command
Output frequency
If you input the DC injection brake command from an external terminal, or if the run command
and jog command are input, the DC injection brake will be disabled, and operation will
resume.
Description
Sets the DC injection braking
current as a percentage of the
Drive rated current.
Note: The DC excitation current
is determined by the setting in E2-
03 when operating in flux loop
vector control mode.
Sets the time of DC injection
braking at start in units of 0.01
seconds.
FRUN
DC injection brake
E1-09
(DC injection braking at
startup is used for flux
vector control.)
Fig 6.16 DC Injection Brake Time Chart
Change
Setting Factory
during
Range Setting
V/f
Operation
0
to 50% No A
100
0.00
to 0.00sec No A
10.00
DC injection brake
b2-01
(DC injection braking at
startup is used for flux
vector control.)
Stopping Methods
Control Methods
Open Open
V/f
Loop Flux Loop
with
Vector Vector Vector
PG
1 2
A A No No
A A A A
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